Coal or rock cutting machine



Sept 24, 1929 F. J. B. BERRY COAL 0R ROCK CUTTING MACHINE Filed Jan. 14,' 1926 3 Sheets-Sheet l In vena/f:

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Sept. 24, 1929. F. J. B. BERRY COAL OR ROCK CUTTING MACHINE Filed Jan. 14, 1926 I5 Sheets-Sheet 2 yan/1111111111 6 VII lll.

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Sept 24, 1929- F. J. B. BERRY GOAL OR ROCK CUTTING' MACHINE 3 Sheets-Sheet 5 Filed Jan. 14, 1926 Patented Sept... 24, 1929 rRANoIs JACQUES BARTHELEMY BERRY, or LILLE, FRANCE COAIi OB ROCK CUTTING MACHINE Application led January 14, 1926-, Seria11i'o. 81,300, and in France January 22, 1925.

The present invention relates to machines for coal or rock cutting; and itinvolves an improved machine for piercing holes of a considerable size in the working face. This machine comprises a tool holder which is rotated by a sleeve surroundingr the same and rotated by mechanical means; the said tool holder is also moved forward (automatically or not) v by a device wherein a cable is wound on a drum, said cable passing over various pulleys which are mounted at the end of the said tool holder.

The appended drawings show by way of example various embodiments of the invention.

Fig. 1 is a plan view of a machine according to the invention and,

Fig. 2 is an end elevation of the rear part of the same,

Fig. 3 is. an elevational view of a modificanon,

Fig. 4 is a plan view of another modification,

Fig. 5 is an enlarged sectional view Vof a spring clutch or coupling which is employed,

Fig. 6 is a detail view, likewise in section and on an enlarged scale, showing the mounting of the rollers for driving the tool holder, and

Fig. 7 is a viewshowing the core formed during cutting.

The machine represented in Figs. 1 and 2A comprises a mainframe 5 provided with lugs 6 to which are attached four jacks 7. Upon the frame 5 is mounted a motor consisting of two compressed air cylinders 8 and 9, the pistons 10 and 11 of which are connected to actuate the crankshaft 12. The shaft 12 carries a pinion 13 engaging a gear wheel 14; which surrounds the cylinder or sleeve 15 within which is disposed the tubular tool holder 16; the latter being provided with external helical wings 17, best shown` in Figs. 1 and 6, whose diameter corresponds to that ofthe said sleeve. Within the sleeve are disposed two oppositely V located abutments or rollers 18 (Figs. 2 and 6) 'which bear against the faces of the wings 17 close to the free edges thereof, so as to rotate the tool holder 16 when the sleeve rotates.

The cool holder 16 carries at its front end a same; and to couple said shaft and drum toring 19 upon which the cutting tools 20 may be mounted;v said holder being fed forward during working by means of a cable 21 which is secured at one end to a fixed point 22 (Fig. 2) on the frame or casing 5 and passes first around a horizontal pulley 23 mounted at the rear end of the holder, then around a vertical pulley 24 disposed upon the frame 5, and then around a pulley 25 arran ed above and parallel with pulley 23, and is nally wound upon a drum 26. This drum is loosely mounted on a shaft 65 (Fig. 5) whereon is keyed a wormy wheel 27 that meshes with a worm 28 rigidly connected to the sleeve 15 and encircling the gether for rotation in unison, a suitable clutch, illustrated in detail in Fig. 5, is provided.

Referring to the ligure specified, it will be seen that the shaft has keyed to it, outside 70 of the frame or casing 5, two disks 66 and 67, disposed at opposite sides of drum 26,`the latter disk being capable of a slight sliding movement. The outer or upper end of said shaft projects into a box 68 containing a spring 29 that bears at one end against the bottom of the box and at the other end against a nut 69 threaded on the shaft; this box having pivoted to it, on the outside, a cam or eccentric 70 adapted to bear upon the extremity of the shaft and provided with an operating handle 30. In Fig. 5, the cam is shown as inactive, exerting no pressure upon the shaft end, so that the pressure of spring 29 tends to couple disks 66 and 67 with drum 26, this being the clutched position of the parts. But when handle 3() is actuated, cam 70 will be caused to press against the shaftend, thereby raising box 68 and, in consequence, the upper disk 67 which is suitably fastened to it, with the result that said disk no longer bears uponthe drum and no longer transmits the rotation of the shaft thereto. 4

The two pulleys 23 and 25 are mounted in a common support 31 (Fig. 1) which is secured to the end of the tool holder 16 through the medium of a circular set of balls, not shown. The support 31 is provided with a lower cap 32 placed upon a rod 33 disposed lengthwise of the machine frame 5, so that the support 31 10 will not follow the rotary movement of the said tool holder.

The operation is as follows:

The machine is dis sed rpendicularly to the working face 34' Fig. 1. and is securely held by the Jacks 7. en the compressed air motor 8, 9 is set in operation, this will rotate the sleeve 15 and the worm wheel 27. The rollers 18 will make contactwith the wings 17 of the tool holderv16 and will thus rotate the latter, while the drum 26, which rotates as far as it is allowed by the said friction coupling, will tend to wind the cable 21, thus aiording a constant pressure upon the tool holder and assurin the constant advance of the said tool hol er as the hole is cut. v

.When the required depth is attained, the

tool holder is brought back in the followlng.

manner:

`'I'he handle 30 is operated in order to unclutch or release the friction coupling and the support 31 is secured tothe tool holder 16 for instance by a lever or wrench 35, thus preventing allA rotation of the said tool holder.

If the motor is now started, the pressure of the rollers 18 against the win s 17 will effect the back motion of the tool ho der, this being working face around the periphery of the hole. In this manner a great eiiiciency can be obtained Without requiring skilled labor for handing the percussion tools. Furthermore, when the material is thrown down in these conditions, it will oier a greater proportion of lar e pieces than in the known methods, and t is result is particularly advantageous in the operation of coal mines.

Fig. 3 shows a modification of the said machine, and herein the tool holder 16 is replaced by the solid. bar 40; in this event the v cutting tools remove all the material of the cutting, and not merely an annularportlon. The piston motor is replaced by a rotary motor 41 which drives the sleeve 42 by means Qf.

at each end b the jacks 54 and serves to guide the tool older 55 which is rotated by a suitable motor 56 through the medium of the aring 57, 58, 59 and 60.

Tg: said tool holder actuates a Worm wheel 61 which as in the preceding case drives thc drum 62 upon which is wound the cable 63 whose outer end is attached to a lug on the guide 53. In this manner, the machine is moved forward by its own means according as the cutting of the tools into the material proceeds.

Obviously, the said inventionv is not limited to the constructions which have been described solely by way of example. Without departing from the principle of the invention numerous dispositions may be adopted as desired; the compressed air motor may f be replaced by an electric motor; the cutting tools may be automatically moved lforward by pinions engaging with the helical portion or with the tube 16 itself; in the cas'e of work of small diameter, or in soft material, the tools may be moved forward simply by hand control.-

I claim as my4 invention:

A coal or rock cutting machine,A compris# ing a rotatably-mounted sleeve, driving means therefor, a tool-holding element extending axially through the sleeve and provided with helicoidal wings, a lurality of rollers attached to the inner sur ace of said sleeve in position to bear laterally and slid- V ably against the wings adj acentthe free edges thereof to transmit the rotation of the sleeve to the wings and the tool-holding element, and means for positively feeding said toolholding element forward relativel to, and

while slidably engaged -by, said ro 1ers dur- 105 its rotation. n testimony whereof I aiiix my signature.

FRANCOIS JACQUES BARTHLMY BERRY.

the worm wheel 43. Two of the aforesaid jacks are eliminated, and are replaced by the supporting shoe 44 which holds the machine in equilibrium when the front acks 45 are released. v

The modificationv shown in Fig. 4 comprises the main frame 50l which is' mountedl upon the wheels 51 which are placed upon the `rails 52. At the front part of the machine is mounted the slotted guide 53 which is held 

